Ammonia-purifier for refrigerating plants.



F. NENZEL. AMMONIA TPURIEIER 03 BEPRIGBRATING PLANTS.

APPLICATION FILED SEPT. 25,1909.

Patented Mar. 1, 1910.

. INVL'N o .00 o 0 50 c n" the following is a specification.

-cham er. on line 22 Fig. 2 and looking toward the FREDERICK NENZEL, 0F CINCINNATI, OHIO.

AMMONIA-PURIFIER FOR REFRIGERATING PLANTS.

Specification or Letters Patent.

Patented Mar. 1, 1910.

Application illed September 25', 1909. Serial No. 519,525.

To all whom it may concern:

Be it known that I, Fnnonmon Nnnznn, a citizen of the United States of America, and resident of Cincinnati, Hamilton county, State of Ohio, have invented certain new and useful Improvements in Ammonia- Purifiers for Refrigerating Plants, of which This invention re ates to the urification of ammonia, by means of caustic soda and vacuum suction.

The object of this invention is to free the ammonia from all impurities, .without losing any of the ammonia, and to give it new life and strength, while in use in the plant.

For a clear understanding of the merits of this invention, reference is made to the accompanying drawing, in which,

Figure 1 is a perspective view of an ammonia purifier embodying my invention, and the interior of a refrigeratin' room, or cellar, being shown in section. ig. 2 is a vertical sectional view of the. purifier embodyin my invention. Fi 3 is a sectional view ta en on line 11 0 Fig. 2, showing the erforated plate of the caustic soda Fig. 4 is a sectional view taken bottom of the tank.

Referring to the drawing, by letters, the following is a description of same.

A purifier B for the ammonia gases is located between coils D of the refrigerating system and a suction pipe A, which may communicate with any suitable exhauster (not shown). ,The purifier consists of a cylindrical shell, a top plate I) and a bottom plate I)", and is divided into a purifying chamber Z)" and a sediment chamber b by a perforated plate I). The purif in chamber 12 is filled with caustic soda,wl'iic% is supported by the perforated plate, and the upper part of this chamber communicates with the suction ipe, A, through a pipe a, which is provi'ed with a valve a.

A trap O communicates, through suitable piping, with the lowest point of the s stem of ammonia coils and through the de ivery pipe I; with the sediment chamber 12 of the purifier. The pipe 6 projects throu h the cylindrical shel of the purifier into t e top portion of the sediment chamber, immediately belowthe perforated plate bl.

A blow-ofi' pipe is secure to the bottom plate. 6" and communicates with the lowest valve may be provi point of the sediment chamber. The blowoff pipe is provided with a blow-off valve b for controlling the discharge of sediment from the chamber. By-pass pipes b are provided for the purpose of causing an a itation of the sediment contained in t c chamber 6. These pipes project through the bottom plate b", extend around the outside of the purifier and project through the c lindrical shell into the upper ortlon of tlie chamber b at oints 1mm lately below the perforated ate 2). Each by-pass od with a valve 6. A gage glass B' communicates with the sediment chamber for the purpose of indicating the agitation which takes place in that chamber, and for also indicating the amount of sediment contained in the chamber. A man-hole b is provided in the top plate 6 and is closed by a suitable cover 6".

Having thus described the parts, a descri tion of the operation of the purifier is as ollows: The li uid ammonia having circulated through the coils, D, and become evaporated, is passed backthrough the large suction pipe, A, to the compressor, and thence to the cooling tower, and back throu h the system, D, etc. The impurities or seed the refrigerating system, at which point I insert the trap C for collecting them and delivering them to the purifier. Originally, this matter was withdrawn from the trap and thrown away. These impurities containing great quantities of ammonia are drawn up to the chamber (b through pipe (6 and deposited in the bottom of cy inder, B. The vacuum produced 'in the interior of the cylinder, B, causes ova oration of ammonia from the surface 0 the mixture of ammonia and impurities in the bottom chamber (6). Tlus evaporation causes a crust of soggy impurities to be left at the top of the mass, and thus evaporation is carried on very slowly. A rovision is made for more rapid evaporation, however. The valves (b) in the pipes (6 are opened and the liquid ammonia and impurlties below the top crust are drawn through these pipes (6 The ammonia is evaporated and the impurities collect upon the surface of the iment collect at the lowest point in y matter in the chamber (1)). The ammonia purities, asses through the caustic soda in the chem r (6), and is cleansed of all l after being evaporated from the said imtraces Ipfl-lfoul matter. throug t e 'i e o to What I chi iI Ii i:

1. In an ammonia ing plants, the com COIlS, a suction pipe, a trap connected to the end of the ammonia coils, a casing, a chamber within the casing, adapted to retain a substance adapted to filter gas, a pipe connecting the bottom of the casing and the trap, and a pipe connecting the top of the casing and the suction pipe, whereby the impurities are drawn from the trap into the bottom of the casing, and the ammonia is Withdrawn from the impurities in the bottom of the casing.

52. In an ammonia urifier for refrigerating plants, the combination of ammonia code, a suction pipe, a trap connected to the end of the ammonia coils, a casin a perforated plate within the casing a ove the bottom thereof, a filtering material supported by the perforated plate, a pipe connectin the bottom of the casing and the trap, an a pipe connecting the top of the casing and the suction pipe, whereby the impurities are drawn from the trap into the bottom of the casing, drawn from the impurities in the bottom of the casing.

3. A filter for ammonia consistin of a casing, a perforated plate supporte upon the interior of the casing, caustic soda supported upon the plate, pipes leading from It then passes out the main suction, A.

urifier for refrigeratination of ammonia the bottom of the casing and terminating upon the interior of the casing at a point beneath the plate, a pipe'adapted to connect the bottom of the casing with a receptacle holdin the material to be purified, and a pipe adapted to connect the top of thecasmg with a suction pipe.

4. In an ammonia purifier for refrigerating plants, the com coils, a trap adapted connected to the ammonia coils, a suction pipe, a casing interposed between the trap and the suction pipe, a late within the casing above the ottom t ereof a filtering substance located on said plate, a pipe connectingthe bottom of the casing with the trap, and a' pipe connecting the top of the casing with the suction pipe, whereb impurities mixed with ammonia are with rawn and the ammonia is with-.

ination of ammonia to collect impuritles, I

'bottom of the casing,

from the tra and into the bottom of the casing, and t e ammonia is separated from the impurities and drawn through the filtering substance and into the suction pipe.

5. In a refrigerating plant, the combination of a system of ammonia coils, a suction pipe, a casing interposed between the system of coils and the suction pipe, a perforated plate within the casing above the bottom thereof a filtering substance supported by said plate, a pipe communicating with the bottom of the casing below said plate and the lowest point of said system of coils, and a pipe communicating with the top of the casing above said substance and with the suction pipe, whereby impurities mixed with the ammonia are withdrawn from the lowest point of the system of coils into the bottom of the casin and ammonia is separated from the impurities and drawn into the suction pipe.

6. In a refrigerating plant a suction pi e, a system of ammonia coils, a purifier or ammonia gas located between said coils and said suction pipe, comprising a casing, a purifying substance located Within said casmg, a space below said substance communicating with the system of.coils, and a bypass pipe communicating with the bottom of the space and projecting into the casing immediately below said filtering substance, and piping communicating with said casing above said substance and with said suction P p 7. In a refrigerating plant the combination of a s stem of ammonia coils, a suction pipe, a casing interposed between the system of coils and the suction pipe, caustic soda contained within said casing, a pi e communicatin caustic soda and with the lowest point of said system of coils, and a pipe communicating with said casin above said caustic soda and with said suction pipe, whereby impurities mixed with the ammonia are withdrawn from the system of coils into the and ammonia is separated from the int urities, drawn through the caustic soda an into the suction ipe. FREDERICK NEN EL. Witnesses:

YVALTER F. MURRAY, B. R. KROPF.

with said. casing be ow the 

